diff --git a/README.md b/README.md
index 17ae5ef..19978c2 100644
--- a/README.md
+++ b/README.md
@@ -27,3 +27,5 @@ Run the bot by running
 ```sh
 python3 bot.py <config-name>
 ```
+
+Use the environment variables `BOARD_API_KEY` and `BOARD_USERNAME` to login with danbooru.